| 摘要 |
PURPOSE: To use force applied to a bolt as opposing holding power applied to a bolt member or a washer in an opposing direction when mutually coupling two parts. CONSTITUTION: A bolt for connecting two parts(8,9) together comprises a bolt member(1) having a longitudinal axis, a screw-threaded first portion(2) equipped with a screw thread, and a second portion(3) equipped with a non-rotatable washer(5), e.g. a friction washer, non-rotatably connected to the polygonal circumference of the second portion(3) and having a first facial area(6) adapted to abut against a facial area(7) of one of the parts(8) and also having an opposite second facial area(11); a sleeve(19) screw-threadedly engaged with the screw-threaded first portion(2) and having a facial area(10) abutting against the second facial area(11) of the washer(5); first engaging means(13) on the sleeve(19) for enabling a given force to be applied to the sleeve in one direction; and second engaging means(12,14) on the bolt member(1,5) to enable a given force to be applied in an opposite direction to that applied to the sleeve, so that when a given force is applied in a first direction to the bolt member(1,5) through the second engaging means(12,14) and a given force is applied in an opposite direction to the sleeve(19) through the first engaging means, only the sleeve(19) turns while the bolt member(1,5) does not turn.
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